Advertisements
Advertisements
Question
A metal oxide that is reduced by hydrogen is
Options
Al2O3
CuO
CaO
Na2O
Solution
CuO
APPEARS IN
RELATED QUESTIONS
A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. Name the element ‘X’ and the black-colored compound formed.
Define corrosion.
What is an oxidation reaction? Identify in the following reaction (i) the substance oxidised, and (ii) the substance reduced:
ZnO + C → Zn + CO
Define redox reaction.
Identify from the reaction the reactants that undergo oxidation and reduction.
Fe + S → FeS
State what is reducing agent. Give an example of oxidising agent in the gaseous, liquid, and solid form.
Explain the following reaction with their balanced chemical equation.
Hydrogen sulphide reacts with sulphur dioxide.
Which among the following are physical or chemical change?
Evaporation of petrol
The tarnishing of metals is an example of ______ reaction.
Identify the following reactions as oxidation/reduction/redox reaction
Zn + CuSO4 → Cu + ZnSO4